Sophos

Troj/Conhook-AF

Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 12 June 2007 03:16:15 (GMT)
Detected by All Sophos products
  • Endpoint Security and Control 9.0
  • Small business solutions 4.0

Action

More Information

Troj/Conhook-AF is a Trojan for the Windows platform.

When Troj/Conhook-AF is installed it creates the file <System>\mms400.dll.

The following registry entries are created to run code exported by mms400.dll on startup:

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mms400
Dllname
mms400.dll

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mms400
Impersonate
0

HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mms400
Startup
NotifyStartup

The file mms400.dll is registered as a COM object and Browser Helper Object (BHO) for Microsoft Internet Explorer, creating registry entries under:

HKCR\CLSID\(187a2478-0138-4940-8bac-ed036d1d4a12)

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\
(187a2478-0138-4940-8bac-ed036d1d4a12)

The following registry entry is set:

HKLM\SOFTWARE\Microsoft\DNIdent
(default)
(187a2478-0138-4940-8bac-ed036d1d4a12)

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